Bunn CDBCF Airpot - Manual (Page 15)

Page 15
TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE REMEDY
Spitting or excessive steaming
(cont.)
Brewer is making unusual noises
2a. Temperature Probe (CDBC-APS/
TC/TS/TSR)
2b. Temperature Probe (CEZ-APS/
TS/TSR)
3. Control Board (CDBC & CEZ)
1. Plumbing lines
2. Water supply
3. Lime build up
A) Remove the probe from the grom-
met and submerge in a water bath
of approximately 70
°F(21°C). Con-
nect an ohmmeter to pins 3 and 4 of
the J3 connector. At 60
°F(16°C)
the reading should be 15.3k
± 2k
OHMS, at 70 °F(21°C) the reading
should be 11.8k
± 2k OHMS, and at
80
°F(27°C) the reading should be
9.3k ± 2k OHMS. If the probe is
within these parameters, reconnect
the J3 plug to the control board.
B) Remove the probe from the grom-
met and submerge in a water bath
of approximately 70
°F(21°C). Con-
nect an ohmmeter to pins 2 and 3 of
the J5 connector. At 60
°F(16°C)
the reading should be 15.3k
± 2k
OHMS, at 70
°F(21°C) the reading
should be 11.8k
± 2k OHMS, and at
80 °F(27°C) the reading should be
9.3k
± 2k OHMS. If the probe is
within these parameters, reconnect
the J5 plug to the control board.
Set the temperature to 200
°F (95°C).
Let tank temperature stabilize. If
temperature in tank is above tem-
perature setting by more than 7
°F,
replace the control board.(See
pages 21 & 22)
Plumbing lines should not rest on
the counter top.
The brewer must be connected to a
cold water supply.
Remove the tank lid and clean in-
side of tank with a deliming agent, if
necessary.
HEATING CIRCUIT (cont.)
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